WHEN a stag do ends up at a karaoke bar, the mic inevitably gets wrecked.

But Ant and Dec let everyone watch them “wreck their mics” once again as the duo rolled back the years to perform their 1994 hit Let’s Get Ready To Rhumble at Mahiki on Wednesday night.

Ant McPartlin and Declan Donnelly, both 37 – the artists formerly known as PJ & Duncan – reunited as their Byker Grove aliases to entertain 15 pals from the TV industry as one of them prepared to get hitched.

As it was a lads’ night, Dec’s new flame, manager Ali Astall, 34, wasn’t at the bash.

Following a night on the cocktails, the group descended to the Mayfair haunt’s motel-themed room, which has a bed, a private barman in the “kitchen” area and a shower room, complete with karaoke machine.

We’re told: “All the lads were getting up to perform something one by one and Ant and Dec were inevitably going to get dragged up.

“Fortunately by this point they’d all sunk a few – there had been a lot of booze around all evening.

“So when Let’s Get Ready... was suggested, they were happy to do it.

“The group was in hysterics.”

Declan Donnelly leaves the Mahiki club (Photo: Xsposure)

Clearly the rest of the gang, which included Jonathan Wilkes, got a little too excited, as Ant ended up covered in a Mahiki coconut cocktail by the time they left at 3am.

The partygoer adds: “Obviously things got fairly rowdy as it was a stag do but even though Ant’s blazer was soaked, they all just laughed it off.”

It hasn’t been too long since the duo’s Rhumble topped the charts again, almost 20 years after its original release date (when it peaked at No9).

The boys performed it on Saturday Night Takeaway in March this year, and it climbed to No1 within days.

Ant said at the time: “We thought we could possibly dust off the old baseball caps and give it a go for a laugh.”

The lads donated all profits from the reissued single to ChildLine, because they’re very nice like that.